US9466411B2 - Non-oriented electrical steel sheet - Google Patents
Non-oriented electrical steel sheet Download PDFInfo
- Publication number
- US9466411B2 US9466411B2 US14/345,086 US201214345086A US9466411B2 US 9466411 B2 US9466411 B2 US 9466411B2 US 201214345086 A US201214345086 A US 201214345086A US 9466411 B2 US9466411 B2 US 9466411B2
- Authority
- US
- United States
- Prior art keywords
- content
- less
- steel sheet
- iron loss
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910052742 iron Inorganic materials 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 229910052718 tin Inorganic materials 0.000 claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052758 niobium Inorganic materials 0.000 abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 36
- 239000010959 steel Substances 0.000 description 36
- 238000000137 annealing Methods 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 27
- 239000010410 layer Substances 0.000 description 19
- 230000004907 flux Effects 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 11
- 150000004767 nitrides Chemical class 0.000 description 11
- 229910052761 rare earth metal Inorganic materials 0.000 description 10
- 230000007423 decrease Effects 0.000 description 7
- 239000002344 surface layer Substances 0.000 description 7
- 238000005098 hot rolling Methods 0.000 description 5
- 238000005097 cold rolling Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005404 magnetometry Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14775—Fe-Si based alloys in the form of sheets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14791—Fe-Si-Al based alloys, e.g. Sendust
Definitions
- This disclosure relates to a non-oriented electrical steel sheet that has excellent iron loss properties, particularly in a high magnetic field.
- Motors for vehicles such as hybrid electric vehicles or electric vehicles require large torque during startup and hill-climbing.
- Increasing motor size is effective in increasing motor torque.
- there is a problem in doing this as it increases vehicle weight and results in reduced fuel efficiency.
- such motors can be designed for use in a non-conventional, high magnetic flux density range, such as 1.9 to 2.0 T, during startup and hill-climbing.
- an electrical steel sheet is punched into the shape of a core constituting a rotor of a motor so that it is used as the core material.
- strain relief annealing may be performed at approximately 750° C. for 2 hours.
- JP 3458682 B discloses a technique of improving grain growth properties during strain relief annealing and reducing iron loss by increasing the amount of Al to add.
- FIG. 1 is a graph illustrating a relationship between the amount of Sb added and the iron loss.
- FIG. 2 is a graph illustrating a relationship between the amount of Mo added and the iron loss.
- each of the hot rolled sheets was subjected to resultant hot rolled sheet annealing in an atmosphere of 100% N 2 at 1000° C. for 30 seconds and, further to cold rolling to be finished to a sheet thickness of 0.35 mm, followed by finish annealing in an atmosphere of 10% H 2 and 90% N 2 at 1000° C. for 10 seconds and strain relief annealing at 750° C. for 2 hours in DX gas (H 2 : 4%, CO: 7%, CO 2 : 8%, N 2 : balance).
- FIG. 1 illustrates the relationship between the amount of Sb added to the test specimens thus obtained and W 19/100 and W 15/100 values.
- the reason why iron loss properties were evaluated under the conditions of 1.9 T and 100 Hz is because products are generally used at around these magnetic flux density and frequency levels during startup and hill-climbing when hybrid electric vehicles require large torque.
- W 15/100 is evaluated is because W 15/100 is a conventional evaluation point. It can be seen from FIG. 1 that the Mo-added steel, in particular, shows a significant reduction in W 19/100 where Sb is 0.001% or more. On the other hand, while the Mo-added steel also shows a reduction in W 15/100 where Sb is 0.001% or more, the magnitude of reduction is relatively small as compared to W 19/100 .
- each steel sheet was analyzed with SEM.
- the results of the analysis are as follows: in each steel sample without Sb and Mo, a nitride layer and an oxide layer were observed on a surface layer of the steel sheet. In each steel sample with only Sb added, formation of a nitride layer was insignificant. Furthermore, in each steel sample with a combination of Sb with Mo added, formation of a nitride layer and formation of an oxide layer were both insignificant. The following assumptions are made regarding the cause of these nitride layers and oxide layers leading to a more significant increase in iron loss in a high magnetic field range.
- the magnetic flux density is not high in a low magnetic field range around 1.5 T, it is possible to allow the passage of the magnetic flux sufficiently by allowing magnetization of only those crystal grains in the steel sheet in which domain wall displacement takes place easily.
- magnetization to a high magnetic field range of 1.9 T requires magnetization of the entire steel sheet. Accordingly, it is necessary to magnetize even those crystal grains in which domain wall displacement is difficult to occur including those in a nitride layer and an oxide layer formed on a surface layer of the steel sheet. It is thus believed that iron loss increased because of a larger amount of energy required to magnetize such crystal grains in which domain wall displacement is difficult to achieve to a high magnetic field range.
- FIG. 2 illustrates the relationship between the amount of Mo added to the test specimens thus obtained and W 19/100 and W 15/100 values. It can be seen from FIG. 2 that W 19/100 decreases where Mo content is 0.001% or more and increases where Mo content is 0.04% or more. On the other hand, W 15/100 showed no reduction in iron loss by addition of Mo, while it turned to increase where Mo content is 0.04% or more. To investigate the cause of a reduction in iron loss in a high magnetic field range where Mo content is 0.001% or more, the structure of each steel sheet was analyzed with SEM.
- Mo content is not less than 0.001% and not more than 0.04%.
- C content is 0.005% or less from the viewpoint of preventing magnetic aging. It is difficult to industrially control C content to 0% and, therefore, C is often contained in an amount of 0.0005% or more.
- Si is an element useful to increase specific resistance of a steel sheet.
- Si is preferably added in an amount of 1% or more.
- Si content exceeding 5% results in a decrease in magnetic flux density and an associated decrease in saturation magnetic flux density.
- the upper limit of Si content is 5%.
- Al like Si, is an element also useful to increase specific resistance of a steel sheet.
- Al is preferably added in an amount of 0.1% or more.
- Al content exceeding 3% results in a decrease in magnetic flux density and an associated decrease in saturation magnetic flux density.
- the upper limit of Al content is 3%.
- Mn is an element useful to increase specific resistance of a steel sheet.
- Mn is preferably added in an amount of 0.1% or more.
- Mn content exceeding 5% results in a decrease in magnetic flux density.
- the upper limit of Mn content is 5%.
- S is an element that would cause an increase in iron loss due to precipitation of MnS if added in an amount exceeding 0.005%.
- the upper limit of S content is 0.005%.
- the lower limit of S content is preferably 0%, it is difficult to industrially control S content to 0%. Therefore, S is often contained in an amount of 0.0005% or more.
- P is an element that would harden a steel sheet if added in an amount exceeding 0.2%.
- P is preferably added in an amount not more than 0.2%, more preferably 0.1% or less. While the lower limit of P content is preferably 0%, it is difficult to industrially control P content to 0%. Therefore, P is often contained in an amount of 0.01% or more.
- N is an element that would lead to precipitation of a larger amount of AlN and increased iron loss if contained in a large amount.
- N content is 0.005% or less. While the lower limit of N content is preferably 0%, it is difficult to industrially control N content to 0%. Therefore, N is often contained in an amount of 0.001% or more.
- Ti is an element that would lead to formation of Ti-based carbonitrides and increased iron loss if contained in an amount exceeding 0.0030%.
- the upper limit of Ti content is 0.0030%.
- the lower limit of Ti content is preferably 0%, it is difficult to industrially control Ti content to 0%. Therefore, Ti is often contained in an amount of 0.0005% or more.
- Nb is an element that would lead to formation of Nb-based carbonitrides and increased iron loss if contained in an amount exceeding 0.0050%.
- the upper limit of Nb content is 0.0050%.
- the lower limit of Nb content is preferably 0%, it is difficult to industrially control Nb content to 0%. Therefore, Nb is often contained in an amount of 0.0001% or more.
- V is an element that would lead to formation of V-based carbonitrides and increased iron loss if contained in an amount exceeding 0.0050%.
- the upper limit of V content is 0.0050%.
- the lower limit of V content is preferably 0%, it is difficult to industrially control V content to 0%. Therefore, V is often contained in an amount of 0.0005% or more.
- Zr is an element that would enhance the nitride forming ability if incorporated. In that case, it is not possible to inhibit the nitridation of a surface layer of a steel sample in a sufficient manner even with addition of Sb, Sn and Mo. This results in an increase in iron loss in a high magnetic field range.
- Zr content is 0.002% or less. While the lower limit of Zr content is preferably 0%, it is difficult to industrially control Zr content to 0%. Therefore, Zr is often contained in an amount of 0.0005% or more.
- Sn like Sb, is an element that would prevent nitridation during finish annealing and reduce iron loss if added in an amount of 0.001% or more.
- the lower limit of Sn content is 0.001%.
- the upper limit of Sn content is 0.1%.
- Ca is an element that precipitates as CaS to suppress precipitation of fine sulfides so that iron loss is reduced.
- Ca is preferably added in an amount of 0.001% or more.
- Ca content exceeding 0.01% leads to precipitation of a larger amount of CaS, which increases rather than reduces iron loss.
- the upper limit of Ca is preferably 0.01%.
- Mg is an element useful to reduce iron loss by controlling the spherical shape of inclusions.
- Mg content is preferably added in an amount of 0.0005% or more.
- the upper limit of Mg content is preferably 0.005%.
- REM or rare earth element
- REM is an element useful to reduce iron loss by coarsening sulfides.
- REM is preferably added in an amount of 0.001% or more.
- the upper limit of REM content is preferably 0.05%.
- Cr is an element useful to reduce iron loss by increasing specific resistance.
- Cr is preferably added in an amount of 0.4% or more.
- Cr content exceeding 5% results in a decrease in magnetic flux density.
- the upper limit of Cr content is preferably 5%.
- reduce Cr content it is more preferable to either reduce Cr content to 0.05% or less, or add Cr in an amount of 0.4 to 5%. If Cr content is reduced to 0.05% or less, the lower limit of Cr content is preferably 0%. However, it is difficult to industrially control Cr content to 0% and, therefore, Cr is often contained in an amount of 0.005% or more.
- Ni, Co and Cu may also be added. These elements are preferably added in the following range: Ni: 0.1 to 5%, Co: 0.1 to 5% and Cu: 0.05 to 2%.
- Molten steel which was obtained by being blown in a converter, was subjected to degassing treatment and subsequent casting to produce steel slabs, each having a chemical composition as shown in Tables 1-1 and 1-2. Then, each of the steel slabs was subjected to slab heating at 1140° C. for 1 hour and then hot rolling to be finished to a sheet thickness of 2.0 mm. In this case, the hot rolling finishing temperature was 800° C. and each hot rolled sheet was coiled at 610° C. after finish rolling. Following coiling, each sheet was subjected to hot rolled sheet annealing in an atmosphere of 100% N 2 at 1000° C. for 30 seconds.
- each sheet was subjected to cold rolling to be finished to a sheet thickness of 0.30 to 0.35 mm and finish annealing in an atmosphere of 10% H 2 and 90% N 2 under the conditions as shown in Tables 2-1 and 2-2. Then, each sheet was evaluated for its magnetic properties as finish annealed or after undergoing strain relief annealing subsequent to the finish annealing. For magnetometry, Epstein measurement was performed where an Epstein sample was cut out from each sheet in a rolling direction and a transverse direction (a direction perpendicular to the rolling direction).
- Comparative Example indicated by ID 48 which has a sheet thickness different from those of the other examples indicated by IDs 1 to 47, the content of one or both of Sn and Sb as well as the content of Mo fall below our range. Therefore, the values of W 15/100 and W 19/100 are higher than those of Example indicated by ID 49 having the same sheet thickness.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Dispersion Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011211553 | 2011-09-27 | ||
JP2011-211553 | 2011-09-27 | ||
PCT/JP2012/006141 WO2013046661A1 (fr) | 2011-09-27 | 2012-09-26 | Feuille d'acier magnétique non à grains orientés |
Publications (2)
Publication Number | Publication Date |
---|---|
US20140345751A1 US20140345751A1 (en) | 2014-11-27 |
US9466411B2 true US9466411B2 (en) | 2016-10-11 |
Family
ID=47994744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/345,086 Active US9466411B2 (en) | 2011-09-27 | 2012-09-26 | Non-oriented electrical steel sheet |
Country Status (8)
Country | Link |
---|---|
US (1) | US9466411B2 (fr) |
EP (1) | EP2762591B1 (fr) |
JP (1) | JP5733409B2 (fr) |
KR (1) | KR101682284B1 (fr) |
CN (1) | CN103827333B (fr) |
MX (1) | MX353669B (fr) |
TW (1) | TWI504762B (fr) |
WO (1) | WO2013046661A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10704115B2 (en) | 2014-10-30 | 2020-07-07 | Jfe Steel Corporation | Non-oriented electrical steel sheet and method for manufacturing non-oriented electrical steel sheet |
US11286537B2 (en) | 2017-01-17 | 2022-03-29 | Jfe Steel Corporation | Non-oriented electrical steel sheet and method of producing same |
US11404189B2 (en) * | 2017-05-31 | 2022-08-02 | Jfe Steel Corporation | Non-oriented electrical steel sheet and method for manufacturing the same |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2907636B2 (ja) | 1992-06-08 | 1999-06-21 | 松下電器産業株式会社 | 水路溝内供給水量制御装置 |
JP6057082B2 (ja) | 2013-03-13 | 2017-01-11 | Jfeスチール株式会社 | 磁気特性に優れる無方向性電磁鋼板 |
JP5995002B2 (ja) | 2013-08-20 | 2016-09-21 | Jfeスチール株式会社 | 高磁束密度無方向性電磁鋼板およびモータ |
KR20150118813A (ko) | 2014-04-15 | 2015-10-23 | 삼성전자주식회사 | 햅틱 정보 운용 방법 및 이를 지원하는 전자 장치 |
JP6236470B2 (ja) * | 2014-08-20 | 2017-11-22 | Jfeスチール株式会社 | 磁気特性に優れる無方向性電磁鋼板 |
JP5975076B2 (ja) * | 2014-08-27 | 2016-08-23 | Jfeスチール株式会社 | 無方向性電磁鋼板およびその製造方法 |
JP6020863B2 (ja) * | 2015-01-07 | 2016-11-02 | Jfeスチール株式会社 | 無方向性電磁鋼板およびその製造方法 |
JP6048699B2 (ja) | 2015-02-18 | 2016-12-21 | Jfeスチール株式会社 | 無方向性電磁鋼板とその製造方法ならびにモータコア |
JP6476979B2 (ja) * | 2015-02-19 | 2019-03-06 | 新日鐵住金株式会社 | 無方向性電磁鋼板およびその製造方法 |
RU2674373C1 (ru) * | 2015-02-24 | 2018-12-07 | ДжФЕ СТИЛ КОРПОРЕЙШН | Способ получения листов из нетекстурированной электротехнической стали |
EP3333271B1 (fr) * | 2015-08-04 | 2020-06-17 | JFE Steel Corporation | Procédé pour la fabrication de tôle d'acier électromagnétique à grains non orientés dotée d'excellentes propriétés magnétiques |
BR112018009722B1 (pt) | 2015-11-20 | 2022-04-05 | Jfe Steel Corporation | Método para produção de uma chapa de aço elétrica não orientada |
JP6402865B2 (ja) * | 2015-11-20 | 2018-10-10 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
JP6638359B2 (ja) * | 2015-12-08 | 2020-01-29 | 日本製鉄株式会社 | 無方向性電磁鋼板およびその製造方法 |
JP6406522B2 (ja) * | 2015-12-09 | 2018-10-17 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
KR101705235B1 (ko) | 2015-12-11 | 2017-02-09 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
KR101701194B1 (ko) * | 2015-12-23 | 2017-02-01 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
KR101892231B1 (ko) * | 2016-12-19 | 2018-08-27 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
KR101901313B1 (ko) | 2016-12-19 | 2018-09-21 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
TWI654317B (zh) | 2017-01-16 | 2019-03-21 | 日商新日鐵住金股份有限公司 | 無方向性電磁鋼板 |
JP6828814B2 (ja) | 2017-06-02 | 2021-02-10 | 日本製鉄株式会社 | 無方向性電磁鋼板 |
RU2650938C1 (ru) * | 2017-11-20 | 2018-04-18 | Юлия Алексеевна Щепочкина | Сплав на основе железа |
RU2660789C1 (ru) * | 2017-12-19 | 2018-07-09 | Юлия Алексеевна Щепочкина | Сплав на основе железа |
TWI696707B (zh) * | 2018-02-16 | 2020-06-21 | 日商日本製鐵股份有限公司 | 無方向性電磁鋼板及無方向性電磁鋼板的製造方法 |
CN108374123A (zh) * | 2018-03-29 | 2018-08-07 | 张可池 | 一种含有稀有元素的磁钢及其制备方法 |
KR102120276B1 (ko) * | 2018-09-27 | 2020-06-08 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
WO2021084785A1 (fr) * | 2019-10-29 | 2021-05-06 | Jfeスチール株式会社 | Tôle d'acier électromagnétique à grains non orientés et son procédé de production |
KR102271299B1 (ko) * | 2019-12-19 | 2021-06-29 | 주식회사 포스코 | 이방향성 전기강판 및 그의 제조방법 |
CN111321344B (zh) * | 2020-03-04 | 2022-03-01 | 马鞍山钢铁股份有限公司 | 一种电动汽车驱动电机用高强度冷轧无取向电工钢及其生产方法 |
CN111471941B (zh) * | 2020-04-27 | 2022-02-01 | 马鞍山钢铁股份有限公司 | 一种屈服强度600MPa级新能源汽车驱动电机转子用高强无取向硅钢及其制造方法 |
CN116867916A (zh) * | 2021-02-19 | 2023-10-10 | 日本制铁株式会社 | 无取向性电磁钢板用热轧钢板、无取向性电磁钢板用热轧钢板的制造方法、以及无取向性电磁钢板的制造方法 |
US11663013B2 (en) | 2021-08-24 | 2023-05-30 | International Business Machines Corporation | Dependency skipping execution |
CN119698491A (zh) * | 2022-09-13 | 2025-03-25 | 杰富意钢铁株式会社 | 高强度无取向性电磁钢板及其制造方法 |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993008313A1 (fr) | 1991-10-22 | 1993-04-29 | Pohang Iron & Steel Co., Ltd. | Plaques d'acier a grains non orientes pour buts electriques presentant des proprietes magnetiques ameliorees, et procede de fabrication |
JPH06108149A (ja) | 1992-09-29 | 1994-04-19 | Nippon Steel Corp | 需要家焼鈍後の鉄損が極めて優れた無方向性珪素鋼板の製造方法 |
JPH0897023A (ja) | 1994-09-29 | 1996-04-12 | Kawasaki Steel Corp | 鉄損特性の優れた無方向性けい素鋼板の製造方法 |
JPH10317111A (ja) | 1996-12-17 | 1998-12-02 | Nkk Corp | 鉄損の低い無方向性電磁鋼板 |
US6139650A (en) | 1997-03-18 | 2000-10-31 | Nkk Corporation | Non-oriented electromagnetic steel sheet and method for manufacturing the same |
KR20010028570A (ko) | 1999-09-22 | 2001-04-06 | 이구택 | 자성이 우수한 무방향성 전기강판 및 그 제조방법 |
CN1305019A (zh) | 1999-09-03 | 2001-07-25 | 川崎制铁株式会社 | 铁损低而且磁通密度高的无取向性电磁钢板及其制造方法 |
JP2003013190A (ja) | 2001-07-02 | 2003-01-15 | Nippon Steel Corp | 高級無方向性電磁鋼板 |
JP2003096548A (ja) | 2001-09-21 | 2003-04-03 | Sumitomo Metal Ind Ltd | 無方向性電磁鋼板とその製造方法 |
JP3458682B2 (ja) | 1997-11-28 | 2003-10-20 | Jfeスチール株式会社 | 歪取り焼鈍後の磁気特性に優れる無方向性電磁鋼板およびその製造方法 |
WO2004013365A1 (fr) | 2002-08-06 | 2004-02-12 | Jfe Steel Corporation | Tole d'acier magnetique non orientee, element pour machine tournante et machine tournante |
US20050013722A1 (en) * | 2001-11-19 | 2005-01-20 | Akira Usami | Low alloy steel excellent in resistance to corrosion by hydrochloric acid and corrosion by sulfuric acid and weld joint comprising the same |
EP1501951A1 (fr) | 2002-05-08 | 2005-02-02 | AK Properties, Inc. | Procede de coulee continue de bande d'acier magnetique non orientee |
US20060124207A1 (en) * | 2002-12-05 | 2006-06-15 | Jfe Steel Corporation | Non-oriented magnetic steel sheet and method for production thereof |
JP2007516345A (ja) | 2003-05-14 | 2007-06-21 | エイケイ・スティール・プロパティーズ・インコーポレイテッド | 無方向性電磁鋼ストリップの改善された製造方法 |
US20090202383A1 (en) * | 2005-07-07 | 2009-08-13 | Ichirou Tanaka | Non-Oriented Electrical Steel Sheet and Production Process Thereof |
US20100158744A1 (en) * | 2006-06-16 | 2010-06-24 | Hidekuni Murakami | High strength electrical steel sheet and method of production of same |
WO2011105327A1 (fr) | 2010-02-25 | 2011-09-01 | 新日本製鐵株式会社 | Tôle d'acier magnétique non orienté |
-
2012
- 2012-09-26 WO PCT/JP2012/006141 patent/WO2013046661A1/fr active Application Filing
- 2012-09-26 CN CN201280046930.XA patent/CN103827333B/zh active Active
- 2012-09-26 JP JP2013535913A patent/JP5733409B2/ja active Active
- 2012-09-26 EP EP12837342.0A patent/EP2762591B1/fr active Active
- 2012-09-26 MX MX2014003083A patent/MX353669B/es active IP Right Grant
- 2012-09-26 US US14/345,086 patent/US9466411B2/en active Active
- 2012-09-26 KR KR1020147005986A patent/KR101682284B1/ko active Active
- 2012-09-27 TW TW101135546A patent/TWI504762B/zh active
Patent Citations (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1078270A (zh) | 1991-10-22 | 1993-11-10 | 浦项综合制铁株式会社 | 磁性能优良的无取向电工钢板及其制法 |
WO1993008313A1 (fr) | 1991-10-22 | 1993-04-29 | Pohang Iron & Steel Co., Ltd. | Plaques d'acier a grains non orientes pour buts electriques presentant des proprietes magnetiques ameliorees, et procede de fabrication |
JPH06108149A (ja) | 1992-09-29 | 1994-04-19 | Nippon Steel Corp | 需要家焼鈍後の鉄損が極めて優れた無方向性珪素鋼板の製造方法 |
JPH0897023A (ja) | 1994-09-29 | 1996-04-12 | Kawasaki Steel Corp | 鉄損特性の優れた無方向性けい素鋼板の製造方法 |
JPH10317111A (ja) | 1996-12-17 | 1998-12-02 | Nkk Corp | 鉄損の低い無方向性電磁鋼板 |
CN1083494C (zh) | 1997-03-18 | 2002-04-24 | 日本钢管株式会社 | 无晶粒取向性磁钢板及其制造方法 |
US6139650A (en) | 1997-03-18 | 2000-10-31 | Nkk Corporation | Non-oriented electromagnetic steel sheet and method for manufacturing the same |
JP3458682B2 (ja) | 1997-11-28 | 2003-10-20 | Jfeスチール株式会社 | 歪取り焼鈍後の磁気特性に優れる無方向性電磁鋼板およびその製造方法 |
US20030024606A1 (en) | 1999-09-03 | 2003-02-06 | Kawasaki Steel Corporation | Non-oriented magnetic steel sheet having low iron loss and high magnetic flux density and manufacturing method therefor |
CN1305019A (zh) | 1999-09-03 | 2001-07-25 | 川崎制铁株式会社 | 铁损低而且磁通密度高的无取向性电磁钢板及其制造方法 |
KR20010028570A (ko) | 1999-09-22 | 2001-04-06 | 이구택 | 자성이 우수한 무방향성 전기강판 및 그 제조방법 |
JP2003013190A (ja) | 2001-07-02 | 2003-01-15 | Nippon Steel Corp | 高級無方向性電磁鋼板 |
JP2003096548A (ja) | 2001-09-21 | 2003-04-03 | Sumitomo Metal Ind Ltd | 無方向性電磁鋼板とその製造方法 |
US20050013722A1 (en) * | 2001-11-19 | 2005-01-20 | Akira Usami | Low alloy steel excellent in resistance to corrosion by hydrochloric acid and corrosion by sulfuric acid and weld joint comprising the same |
EP1501951A1 (fr) | 2002-05-08 | 2005-02-02 | AK Properties, Inc. | Procede de coulee continue de bande d'acier magnetique non orientee |
WO2004013365A1 (fr) | 2002-08-06 | 2004-02-12 | Jfe Steel Corporation | Tole d'acier magnetique non orientee, element pour machine tournante et machine tournante |
US20060124207A1 (en) * | 2002-12-05 | 2006-06-15 | Jfe Steel Corporation | Non-oriented magnetic steel sheet and method for production thereof |
JP2007516345A (ja) | 2003-05-14 | 2007-06-21 | エイケイ・スティール・プロパティーズ・インコーポレイテッド | 無方向性電磁鋼ストリップの改善された製造方法 |
US20090202383A1 (en) * | 2005-07-07 | 2009-08-13 | Ichirou Tanaka | Non-Oriented Electrical Steel Sheet and Production Process Thereof |
US20100158744A1 (en) * | 2006-06-16 | 2010-06-24 | Hidekuni Murakami | High strength electrical steel sheet and method of production of same |
WO2011105327A1 (fr) | 2010-02-25 | 2011-09-01 | 新日本製鐵株式会社 | Tôle d'acier magnétique non orienté |
TW201139699A (en) | 2010-02-25 | 2011-11-16 | Nippon Steel Corp | Non-oriented magnetic steel sheet |
Non-Patent Citations (9)
Title |
---|
Chinese Office Action dated Mar. 11, 2015 of corresponding Chinese Application No. 201280046930.x along with its English translation. |
Chinese Office Action dated Nov. 18, 2015 of corresponding Chinese Application No. 201280046930.X along with an English translation. |
Japanese Office Action dated Sep. 16, 2014 from corresponding Japanese Patent Application No. 2013-535913 along with an English translation. |
Korean Office Action dated Jan. 12, 2016 of corresponding Korean Application No. 2014-7005986 along with a Concise Statement of Relevance of Office Action in English. |
Korean Office Action dated Jul. 6, 2016, of corresponding Korean Application No. 2014-7005986 along with a Concise Statement of Relevance of Office Action in English. |
Notice of Grounds for Rejection dated Jul. 14, 2015 of corresponding Korean Patent Application No. 2014-7005986 along with an English translation. |
Notification of Reasons for Refusal of Japanese Application No. 2013-535913 dated Dec. 9, 2014 with English translation. |
Supplemental European Search Report dated Jun. 17, 2015 of corresponding European Application No. 12837342.0. |
Taiwanese Office Action dated Jul. 4, 2014 along with an English translation from corresponding Taiwanese Patent Application No. 101335546. |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10704115B2 (en) | 2014-10-30 | 2020-07-07 | Jfe Steel Corporation | Non-oriented electrical steel sheet and method for manufacturing non-oriented electrical steel sheet |
US11286537B2 (en) | 2017-01-17 | 2022-03-29 | Jfe Steel Corporation | Non-oriented electrical steel sheet and method of producing same |
US11404189B2 (en) * | 2017-05-31 | 2022-08-02 | Jfe Steel Corporation | Non-oriented electrical steel sheet and method for manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
TW201319273A (zh) | 2013-05-16 |
CN103827333B (zh) | 2016-09-21 |
EP2762591A4 (fr) | 2015-07-15 |
WO2013046661A1 (fr) | 2013-04-04 |
TWI504762B (zh) | 2015-10-21 |
KR20140044929A (ko) | 2014-04-15 |
EP2762591A1 (fr) | 2014-08-06 |
KR101682284B1 (ko) | 2016-12-05 |
MX353669B (es) | 2018-01-23 |
JP5733409B2 (ja) | 2015-06-10 |
EP2762591B1 (fr) | 2020-02-26 |
MX2014003083A (es) | 2014-04-25 |
US20140345751A1 (en) | 2014-11-27 |
JPWO2013046661A1 (ja) | 2015-03-26 |
CN103827333A (zh) | 2014-05-28 |
WO2013046661A8 (fr) | 2014-04-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9466411B2 (en) | Non-oriented electrical steel sheet | |
EP3533890B1 (fr) | Tôle d'acier électrique non orientée et son procédé de production | |
CN105378130B (zh) | 高磁通密度无取向性电磁钢板及电动机 | |
EP3572545B1 (fr) | Tôle d'acier électromagnétique non orientée et son procédé de production | |
EP2960352B1 (fr) | Tôle d'acier laminé à chaud pour la fabrication d'une tôle d'acier électromagnétique non orienté et son procédé de fabrication | |
EP2975152B1 (fr) | Tôle d'acier électrique non orienté présentant d'excellentes propriétés magnétiques. | |
CA2993594C (fr) | Tole d'acier electromagnetique a grains non orientes et procede de fabrication de cette derniere | |
RU2650469C2 (ru) | Лист из нетекстурированной электротехнической стали с отличными потерями в железе на высокой частоте | |
KR102691108B1 (ko) | 무방향성 전기 강판 및 그 제조 방법 | |
JPWO2020136993A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
US20140342150A1 (en) | Non-oriented electrical steel sheet | |
EP3564399B1 (fr) | Feuille d'acier électromagnétique non orientée ayant une excellente aptitude au recyclage | |
JP6123234B2 (ja) | 電磁鋼板 | |
JP6950748B2 (ja) | 無方向性電磁鋼板の製造方法 | |
US12123082B2 (en) | Non-oriented electrical steel sheet | |
US20200308676A1 (en) | Multilayer electrical steel sheet | |
JP2023508294A (ja) | 無方向性電磁鋼板およびその製造方法 | |
JP2004076056A (ja) | セミプロセス用無方向性電磁鋼板 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JFE STEEL CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ODA, YOSHIHIKO;TODA, HIROAKI;NAKANISHI, TADASHI;AND OTHERS;REEL/FRAME:032442/0936 Effective date: 20131212 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |